From 2de003154d52b2e2dc7256fee3dc67cc573c588e Mon Sep 17 00:00:00 2001
From: gziolo <gziolo@git.wordpress.org>
Date: Wed, 31 Jan 2024 08:31:29 +0000
Subject: [PATCH] Script Modules API: Add import map polyfill for older
 browsers

Syncs the changes from https://github.com/WordPress/gutenberg/pull/58263. Adds a polyfill to make import maps compatible with unsported browsers (https://caniuse.com/import-maps).

Fixes #60348.
Props cbravobernal, jorbin, luisherranz, jonsurrell.


Built from https://develop.svn.wordpress.org/trunk@57492


git-svn-id: http://core.svn.wordpress.org/trunk@56993 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/class-wp-script-modules.php       |  16 +
 .../js/dist/vendor/wp-polyfill-importmap.js   | 970 ++++++++++++++++++
 .../dist/vendor/wp-polyfill-importmap.min.js  |   1 +
 wp-includes/script-loader.php                 |   2 +
 wp-includes/version.php                       |   2 +-
 5 files changed, 990 insertions(+), 1 deletion(-)
 create mode 100644 wp-includes/js/dist/vendor/wp-polyfill-importmap.js
 create mode 100644 wp-includes/js/dist/vendor/wp-polyfill-importmap.min.js

diff --git a/wp-includes/class-wp-script-modules.php b/wp-includes/class-wp-script-modules.php
index 7eebb79da1..b2413d0f24 100644
--- a/wp-includes/class-wp-script-modules.php
+++ b/wp-includes/class-wp-script-modules.php
@@ -211,10 +211,26 @@ class WP_Script_Modules {
 	 * Prints the import map using a script tag with a type="importmap" attribute.
 	 *
 	 * @since 6.5.0
+	 *
+	 * @global WP_Scripts $wp_scripts The WP_Scripts object for printing the polyfill.
 	 */
 	public function print_import_map() {
 		$import_map = $this->get_import_map();
 		if ( ! empty( $import_map['imports'] ) ) {
+			global $wp_scripts;
+			if ( isset( $wp_scripts ) ) {
+				wp_print_inline_script_tag(
+					wp_get_script_polyfill(
+						$wp_scripts,
+						array(
+							'HTMLScriptElement.supports && HTMLScriptElement.supports("importmap")' => 'wp-polyfill-importmap',
+						)
+					),
+					array(
+						'id' => 'wp-load-polyfill-importmap',
+					)
+				);
+			}
 			wp_print_inline_script_tag(
 				wp_json_encode( $import_map, JSON_HEX_TAG | JSON_HEX_AMP ),
 				array(
diff --git a/wp-includes/js/dist/vendor/wp-polyfill-importmap.js b/wp-includes/js/dist/vendor/wp-polyfill-importmap.js
new file mode 100644
index 0000000000..7ec4661ca0
--- /dev/null
+++ b/wp-includes/js/dist/vendor/wp-polyfill-importmap.js
@@ -0,0 +1,970 @@
+/* ES Module Shims Wasm 1.8.2 */
+(function () {
+
+  const hasWindow = typeof window !== 'undefined';
+  const hasDocument = typeof document !== 'undefined';
+
+  const noop = () => {};
+
+  const optionsScript = hasDocument ? document.querySelector('script[type=esms-options]') : undefined;
+
+  const esmsInitOptions = optionsScript ? JSON.parse(optionsScript.innerHTML) : {};
+  Object.assign(esmsInitOptions, self.esmsInitOptions || {});
+
+  let shimMode = hasDocument ? !!esmsInitOptions.shimMode : true;
+
+  const importHook = globalHook(shimMode && esmsInitOptions.onimport);
+  const resolveHook = globalHook(shimMode && esmsInitOptions.resolve);
+  let fetchHook = esmsInitOptions.fetch ? globalHook(esmsInitOptions.fetch) : fetch;
+  const metaHook = esmsInitOptions.meta ? globalHook(shimMode && esmsInitOptions.meta) : noop;
+
+  const mapOverrides = esmsInitOptions.mapOverrides;
+
+  let nonce = esmsInitOptions.nonce;
+  if (!nonce && hasDocument) {
+    const nonceElement = document.querySelector('script[nonce]');
+    if (nonceElement)
+      nonce = nonceElement.nonce || nonceElement.getAttribute('nonce');
+  }
+
+  const onerror = globalHook(esmsInitOptions.onerror || noop);
+  const onpolyfill = esmsInitOptions.onpolyfill ? globalHook(esmsInitOptions.onpolyfill) : () => {
+    console.log('%c^^ Module TypeError above is polyfilled and can be ignored ^^', 'font-weight:900;color:#391');
+  };
+
+  const { revokeBlobURLs, noLoadEventRetriggers, enforceIntegrity } = esmsInitOptions;
+
+  function globalHook (name) {
+    return typeof name === 'string' ? self[name] : name;
+  }
+
+  const enable = Array.isArray(esmsInitOptions.polyfillEnable) ? esmsInitOptions.polyfillEnable : [];
+  const cssModulesEnabled = enable.includes('css-modules');
+  const jsonModulesEnabled = enable.includes('json-modules');
+
+  const edge = !navigator.userAgentData && !!navigator.userAgent.match(/Edge\/\d+\.\d+/);
+
+  const baseUrl = hasDocument
+    ? document.baseURI
+    : `${location.protocol}//${location.host}${location.pathname.includes('/') 
+    ? location.pathname.slice(0, location.pathname.lastIndexOf('/') + 1) 
+    : location.pathname}`;
+
+  const createBlob = (source, type = 'text/javascript') => URL.createObjectURL(new Blob([source], { type }));
+  let { skip } = esmsInitOptions;
+  if (Array.isArray(skip)) {
+    const l = skip.map(s => new URL(s, baseUrl).href);
+    skip = s => l.some(i => i[i.length - 1] === '/' && s.startsWith(i) || s === i);
+  }
+  else if (typeof skip === 'string') {
+    const r = new RegExp(skip);
+    skip = s => r.test(s);
+  } else if (skip instanceof RegExp) {
+    skip = s => skip.test(s);
+  }
+
+  const eoop = err => setTimeout(() => { throw err });
+
+  const throwError = err => { (self.reportError || hasWindow && window.safari && console.error || eoop)(err), void onerror(err); };
+
+  function fromParent (parent) {
+    return parent ? ` imported from ${parent}` : '';
+  }
+
+  let importMapSrcOrLazy = false;
+
+  function setImportMapSrcOrLazy () {
+    importMapSrcOrLazy = true;
+  }
+
+  // shim mode is determined on initialization, no late shim mode
+  if (!shimMode) {
+    if (document.querySelectorAll('script[type=module-shim],script[type=importmap-shim],link[rel=modulepreload-shim]').length) {
+      shimMode = true;
+    }
+    else {
+      let seenScript = false;
+      for (const script of document.querySelectorAll('script[type=module],script[type=importmap]')) {
+        if (!seenScript) {
+          if (script.type === 'module' && !script.ep)
+            seenScript = true;
+        }
+        else if (script.type === 'importmap' && seenScript) {
+          importMapSrcOrLazy = true;
+          break;
+        }
+      }
+    }
+  }
+
+  const backslashRegEx = /\\/g;
+
+  function asURL (url) {
+    try {
+      if (url.indexOf(':') !== -1)
+        return new URL(url).href;
+    }
+    catch (_) {}
+  }
+
+  function resolveUrl (relUrl, parentUrl) {
+    return resolveIfNotPlainOrUrl(relUrl, parentUrl) || (asURL(relUrl) || resolveIfNotPlainOrUrl('./' + relUrl, parentUrl));
+  }
+
+  function resolveIfNotPlainOrUrl (relUrl, parentUrl) {
+    const hIdx = parentUrl.indexOf('#'), qIdx = parentUrl.indexOf('?');
+    if (hIdx + qIdx > -2)
+      parentUrl = parentUrl.slice(0, hIdx === -1 ? qIdx : qIdx === -1 || qIdx > hIdx ? hIdx : qIdx);
+    if (relUrl.indexOf('\\') !== -1)
+      relUrl = relUrl.replace(backslashRegEx, '/');
+    // protocol-relative
+    if (relUrl[0] === '/' && relUrl[1] === '/') {
+      return parentUrl.slice(0, parentUrl.indexOf(':') + 1) + relUrl;
+    }
+    // relative-url
+    else if (relUrl[0] === '.' && (relUrl[1] === '/' || relUrl[1] === '.' && (relUrl[2] === '/' || relUrl.length === 2 && (relUrl += '/')) ||
+        relUrl.length === 1  && (relUrl += '/')) ||
+        relUrl[0] === '/') {
+      const parentProtocol = parentUrl.slice(0, parentUrl.indexOf(':') + 1);
+      if (parentProtocol === 'blob:') {
+        throw new TypeError(`Failed to resolve module specifier "${relUrl}". Invalid relative url or base scheme isn't hierarchical.`);
+      }
+      // Disabled, but these cases will give inconsistent results for deep backtracking
+      //if (parentUrl[parentProtocol.length] !== '/')
+      //  throw new Error('Cannot resolve');
+      // read pathname from parent URL
+      // pathname taken to be part after leading "/"
+      let pathname;
+      if (parentUrl[parentProtocol.length + 1] === '/') {
+        // resolving to a :// so we need to read out the auth and host
+        if (parentProtocol !== 'file:') {
+          pathname = parentUrl.slice(parentProtocol.length + 2);
+          pathname = pathname.slice(pathname.indexOf('/') + 1);
+        }
+        else {
+          pathname = parentUrl.slice(8);
+        }
+      }
+      else {
+        // resolving to :/ so pathname is the /... part
+        pathname = parentUrl.slice(parentProtocol.length + (parentUrl[parentProtocol.length] === '/'));
+      }
+
+      if (relUrl[0] === '/')
+        return parentUrl.slice(0, parentUrl.length - pathname.length - 1) + relUrl;
+
+      // join together and split for removal of .. and . segments
+      // looping the string instead of anything fancy for perf reasons
+      // '../../../../../z' resolved to 'x/y' is just 'z'
+      const segmented = pathname.slice(0, pathname.lastIndexOf('/') + 1) + relUrl;
+
+      const output = [];
+      let segmentIndex = -1;
+      for (let i = 0; i < segmented.length; i++) {
+        // busy reading a segment - only terminate on '/'
+        if (segmentIndex !== -1) {
+          if (segmented[i] === '/') {
+            output.push(segmented.slice(segmentIndex, i + 1));
+            segmentIndex = -1;
+          }
+          continue;
+        }
+        // new segment - check if it is relative
+        else if (segmented[i] === '.') {
+          // ../ segment
+          if (segmented[i + 1] === '.' && (segmented[i + 2] === '/' || i + 2 === segmented.length)) {
+            output.pop();
+            i += 2;
+            continue;
+          }
+          // ./ segment
+          else if (segmented[i + 1] === '/' || i + 1 === segmented.length) {
+            i += 1;
+            continue;
+          }
+        }
+        // it is the start of a new segment
+        while (segmented[i] === '/') i++;
+        segmentIndex = i; 
+      }
+      // finish reading out the last segment
+      if (segmentIndex !== -1)
+        output.push(segmented.slice(segmentIndex));
+      return parentUrl.slice(0, parentUrl.length - pathname.length) + output.join('');
+    }
+  }
+
+  function resolveAndComposeImportMap (json, baseUrl, parentMap) {
+    const outMap = { imports: Object.assign({}, parentMap.imports), scopes: Object.assign({}, parentMap.scopes) };
+
+    if (json.imports)
+      resolveAndComposePackages(json.imports, outMap.imports, baseUrl, parentMap);
+
+    if (json.scopes)
+      for (let s in json.scopes) {
+        const resolvedScope = resolveUrl(s, baseUrl);
+        resolveAndComposePackages(json.scopes[s], outMap.scopes[resolvedScope] || (outMap.scopes[resolvedScope] = {}), baseUrl, parentMap);
+      }
+
+    return outMap;
+  }
+
+  function getMatch (path, matchObj) {
+    if (matchObj[path])
+      return path;
+    let sepIndex = path.length;
+    do {
+      const segment = path.slice(0, sepIndex + 1);
+      if (segment in matchObj)
+        return segment;
+    } while ((sepIndex = path.lastIndexOf('/', sepIndex - 1)) !== -1)
+  }
+
+  function applyPackages (id, packages) {
+    const pkgName = getMatch(id, packages);
+    if (pkgName) {
+      const pkg = packages[pkgName];
+      if (pkg === null) return;
+      return pkg + id.slice(pkgName.length);
+    }
+  }
+
+
+  function resolveImportMap (importMap, resolvedOrPlain, parentUrl) {
+    let scopeUrl = parentUrl && getMatch(parentUrl, importMap.scopes);
+    while (scopeUrl) {
+      const packageResolution = applyPackages(resolvedOrPlain, importMap.scopes[scopeUrl]);
+      if (packageResolution)
+        return packageResolution;
+      scopeUrl = getMatch(scopeUrl.slice(0, scopeUrl.lastIndexOf('/')), importMap.scopes);
+    }
+    return applyPackages(resolvedOrPlain, importMap.imports) || resolvedOrPlain.indexOf(':') !== -1 && resolvedOrPlain;
+  }
+
+  function resolveAndComposePackages (packages, outPackages, baseUrl, parentMap) {
+    for (let p in packages) {
+      const resolvedLhs = resolveIfNotPlainOrUrl(p, baseUrl) || p;
+      if ((!shimMode || !mapOverrides) && outPackages[resolvedLhs] && (outPackages[resolvedLhs] !== packages[resolvedLhs])) {
+        throw Error(`Rejected map override "${resolvedLhs}" from ${outPackages[resolvedLhs]} to ${packages[resolvedLhs]}.`);
+      }
+      let target = packages[p];
+      if (typeof target !== 'string')
+        continue;
+      const mapped = resolveImportMap(parentMap, resolveIfNotPlainOrUrl(target, baseUrl) || target, baseUrl);
+      if (mapped) {
+        outPackages[resolvedLhs] = mapped;
+        continue;
+      }
+      console.warn(`Mapping "${p}" -> "${packages[p]}" does not resolve`);
+    }
+  }
+
+  let dynamicImport = !hasDocument && (0, eval)('u=>import(u)');
+
+  let supportsDynamicImport;
+
+  const dynamicImportCheck = hasDocument && new Promise(resolve => {
+    const s = Object.assign(document.createElement('script'), {
+      src: createBlob('self._d=u=>import(u)'),
+      ep: true
+    });
+    s.setAttribute('nonce', nonce);
+    s.addEventListener('load', () => {
+      if (!(supportsDynamicImport = !!(dynamicImport = self._d))) {
+        let err;
+        window.addEventListener('error', _err => err = _err);
+        dynamicImport = (url, opts) => new Promise((resolve, reject) => {
+          const s = Object.assign(document.createElement('script'), {
+            type: 'module',
+            src: createBlob(`import*as m from'${url}';self._esmsi=m`)
+          });
+          err = undefined;
+          s.ep = true;
+          if (nonce)
+            s.setAttribute('nonce', nonce);
+          // Safari is unique in supporting module script error events
+          s.addEventListener('error', cb);
+          s.addEventListener('load', cb);
+          function cb (_err) {
+            document.head.removeChild(s);
+            if (self._esmsi) {
+              resolve(self._esmsi, baseUrl);
+              self._esmsi = undefined;
+            }
+            else {
+              reject(!(_err instanceof Event) && _err || err && err.error || new Error(`Error loading ${opts && opts.errUrl || url} (${s.src}).`));
+              err = undefined;
+            }
+          }
+          document.head.appendChild(s);
+        });
+      }
+      document.head.removeChild(s);
+      delete self._d;
+      resolve();
+    });
+    document.head.appendChild(s);
+  });
+
+  // support browsers without dynamic import support (eg Firefox 6x)
+  let supportsJsonAssertions = false;
+  let supportsCssAssertions = false;
+
+  const supports = hasDocument && HTMLScriptElement.supports;
+
+  let supportsImportMaps = supports && supports.name === 'supports' && supports('importmap');
+  let supportsImportMeta = supportsDynamicImport;
+
+  const importMetaCheck = 'import.meta';
+  const cssModulesCheck = `import"x"assert{type:"css"}`;
+  const jsonModulesCheck = `import"x"assert{type:"json"}`;
+
+  let featureDetectionPromise = Promise.resolve(dynamicImportCheck).then(() => {
+    if (!supportsDynamicImport)
+      return;
+
+    if (!hasDocument)
+      return Promise.all([
+        supportsImportMaps || dynamicImport(createBlob(importMetaCheck)).then(() => supportsImportMeta = true, noop),
+        cssModulesEnabled && dynamicImport(createBlob(cssModulesCheck.replace('x', createBlob('', 'text/css')))).then(() => supportsCssAssertions = true, noop),
+        jsonModulesEnabled && dynamicImport(createBlob(jsonModulescheck.replace('x', createBlob('{}', 'text/json')))).then(() => supportsJsonAssertions = true, noop),
+      ]);
+
+    return new Promise(resolve => {
+      const iframe = document.createElement('iframe');
+      iframe.style.display = 'none';
+      iframe.setAttribute('nonce', nonce);
+      function cb ({ data }) {
+        const isFeatureDetectionMessage = Array.isArray(data) && data[0] === 'esms';
+        if (!isFeatureDetectionMessage) {
+          return;
+        }
+        supportsImportMaps = data[1];
+        supportsImportMeta = data[2];
+        supportsCssAssertions = data[3];
+        supportsJsonAssertions = data[4];
+        resolve();
+        document.head.removeChild(iframe);
+        window.removeEventListener('message', cb, false);
+      }
+      window.addEventListener('message', cb, false);
+
+      const importMapTest = `<script nonce=${nonce || ''}>b=(s,type='text/javascript')=>URL.createObjectURL(new Blob([s],{type}));document.head.appendChild(Object.assign(document.createElement('script'),{type:'importmap',nonce:"${nonce}",innerText:\`{"imports":{"x":"\${b('')}"}}\`}));Promise.all([${
+      supportsImportMaps ? 'true,true' : `'x',b('${importMetaCheck}')`}, ${cssModulesEnabled ? `b('${cssModulesCheck}'.replace('x',b('','text/css')))` : 'false'}, ${
+      jsonModulesEnabled ? `b('${jsonModulesCheck}'.replace('x',b('{}','text/json')))` : 'false'}].map(x =>typeof x==='string'?import(x).then(x =>!!x,()=>false):x)).then(a=>parent.postMessage(['esms'].concat(a),'*'))<${''}/script>`;
+
+      // Safari will call onload eagerly on head injection, but we don't want the Wechat
+      // path to trigger before setting srcdoc, therefore we track the timing
+      let readyForOnload = false, onloadCalledWhileNotReady = false;
+      function doOnload () {
+        if (!readyForOnload) {
+          onloadCalledWhileNotReady = true;
+          return;
+        }
+        // WeChat browser doesn't support setting srcdoc scripts
+        // But iframe sandboxes don't support contentDocument so we do this as a fallback
+        const doc = iframe.contentDocument;
+        if (doc && doc.head.childNodes.length === 0) {
+          const s = doc.createElement('script');
+          if (nonce)
+            s.setAttribute('nonce', nonce);
+          s.innerHTML = importMapTest.slice(15 + (nonce ? nonce.length : 0), -9);
+          doc.head.appendChild(s);
+        }
+      }
+
+      iframe.onload = doOnload;
+      // WeChat browser requires append before setting srcdoc
+      document.head.appendChild(iframe);
+
+      // setting srcdoc is not supported in React native webviews on iOS
+      // setting src to a blob URL results in a navigation event in webviews
+      // document.write gives usability warnings
+      readyForOnload = true;
+      if ('srcdoc' in iframe)
+        iframe.srcdoc = importMapTest;
+      else
+        iframe.contentDocument.write(importMapTest);
+      // retrigger onload for Safari only if necessary
+      if (onloadCalledWhileNotReady) doOnload();
+    });
+  });
+
+  /* es-module-lexer 1.4.1 */
+  const A=1===new Uint8Array(new Uint16Array([1]).buffer)[0];function parse(E,g="@"){if(!C)return init.then((()=>parse(E)));const I=E.length+1,k=(C.__heap_base.value||C.__heap_base)+4*I-C.memory.buffer.byteLength;k>0&&C.memory.grow(Math.ceil(k/65536));const K=C.sa(I-1);if((A?B:Q)(E,new Uint16Array(C.memory.buffer,K,I)),!C.parse())throw Object.assign(new Error(`Parse error ${g}:${E.slice(0,C.e()).split("\n").length}:${C.e()-E.lastIndexOf("\n",C.e()-1)}`),{idx:C.e()});const o=[],D=[];for(;C.ri();){const A=C.is(),Q=C.ie(),B=C.ai(),g=C.id(),I=C.ss(),k=C.se();let K;C.ip()&&(K=w(E.slice(-1===g?A-1:A,-1===g?Q+1:Q))),o.push({n:K,s:A,e:Q,ss:I,se:k,d:g,a:B});}for(;C.re();){const A=C.es(),Q=C.ee(),B=C.els(),g=C.ele(),I=E.slice(A,Q),k=I[0],K=B<0?void 0:E.slice(B,g),o=K?K[0]:"";D.push({s:A,e:Q,ls:B,le:g,n:'"'===k||"'"===k?w(I):I,ln:'"'===o||"'"===o?w(K):K});}function w(A){try{return (0,eval)(A)}catch(A){}}return [o,D,!!C.f(),!!C.ms()]}function Q(A,Q){const B=A.length;let C=0;for(;C<B;){const B=A.charCodeAt(C);Q[C++]=(255&B)<<8|B>>>8;}}function B(A,Q){const B=A.length;let C=0;for(;C<B;)Q[C]=A.charCodeAt(C++);}let C;const init=WebAssembly.compile((E="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","undefined"!=typeof Buffer?Buffer.from(E,"base64"):Uint8Array.from(atob(E),(A=>A.charCodeAt(0))))).then(WebAssembly.instantiate).then((({exports:A})=>{C=A;}));var E;
+
+  async function _resolve (id, parentUrl) {
+    const urlResolved = resolveIfNotPlainOrUrl(id, parentUrl) || asURL(id);
+    return {
+      r: resolveImportMap(importMap, urlResolved || id, parentUrl) || throwUnresolved(id, parentUrl),
+      // b = bare specifier
+      b: !urlResolved && !asURL(id)
+    };
+  }
+
+  const resolve = resolveHook ? async (id, parentUrl) => {
+    let result = resolveHook(id, parentUrl, defaultResolve);
+    // will be deprecated in next major
+    if (result && result.then)
+      result = await result;
+    return result ? { r: result, b: !resolveIfNotPlainOrUrl(id, parentUrl) && !asURL(id) } : _resolve(id, parentUrl);
+  } : _resolve;
+
+  // importShim('mod');
+  // importShim('mod', { opts });
+  // importShim('mod', { opts }, parentUrl);
+  // importShim('mod', parentUrl);
+  async function importShim (id, ...args) {
+    // parentUrl if present will be the last argument
+    let parentUrl = args[args.length - 1];
+    if (typeof parentUrl !== 'string')
+      parentUrl = baseUrl;
+    // needed for shim check
+    await initPromise;
+    if (importHook) await importHook(id, typeof args[1] !== 'string' ? args[1] : {}, parentUrl);
+    if (acceptingImportMaps || shimMode || !baselinePassthrough) {
+      if (hasDocument)
+        processScriptsAndPreloads(true);
+      if (!shimMode)
+        acceptingImportMaps = false;
+    }
+    await importMapPromise;
+    return topLevelLoad((await resolve(id, parentUrl)).r, { credentials: 'same-origin' });
+  }
+
+  self.importShim = importShim;
+
+  function defaultResolve (id, parentUrl) {
+    return resolveImportMap(importMap, resolveIfNotPlainOrUrl(id, parentUrl) || id, parentUrl) || throwUnresolved(id, parentUrl);
+  }
+
+  function throwUnresolved (id, parentUrl) {
+    throw Error(`Unable to resolve specifier '${id}'${fromParent(parentUrl)}`);
+  }
+
+  const resolveSync = (id, parentUrl = baseUrl) => {
+    parentUrl = `${parentUrl}`;
+    const result = resolveHook && resolveHook(id, parentUrl, defaultResolve);
+    return result && !result.then ? result : defaultResolve(id, parentUrl);
+  };
+
+  function metaResolve (id, parentUrl = this.url) {
+    return resolveSync(id, parentUrl);
+  }
+
+  importShim.resolve = resolveSync;
+  importShim.getImportMap = () => JSON.parse(JSON.stringify(importMap));
+  importShim.addImportMap = importMapIn => {
+    if (!shimMode) throw new Error('Unsupported in polyfill mode.');
+    importMap = resolveAndComposeImportMap(importMapIn, baseUrl, importMap);
+  };
+
+  const registry = importShim._r = {};
+  importShim._w = {};
+
+  async function loadAll (load, seen) {
+    if (load.b || seen[load.u])
+      return;
+    seen[load.u] = 1;
+    await load.L;
+    await Promise.all(load.d.map(dep => loadAll(dep, seen)));
+    if (!load.n)
+      load.n = load.d.some(dep => dep.n);
+  }
+
+  let importMap = { imports: {}, scopes: {} };
+  let baselinePassthrough;
+
+  const initPromise = featureDetectionPromise.then(() => {
+    baselinePassthrough = esmsInitOptions.polyfillEnable !== true && supportsDynamicImport && supportsImportMeta && supportsImportMaps && (!jsonModulesEnabled || supportsJsonAssertions) && (!cssModulesEnabled || supportsCssAssertions) && !importMapSrcOrLazy;
+    if (hasDocument) {
+      if (!supportsImportMaps) {
+        const supports = HTMLScriptElement.supports || (type => type === 'classic' || type === 'module');
+        HTMLScriptElement.supports = type => type === 'importmap' || supports(type);
+      }
+      if (shimMode || !baselinePassthrough) {
+        new MutationObserver(mutations => {
+          for (const mutation of mutations) {
+            if (mutation.type !== 'childList') continue;
+            for (const node of mutation.addedNodes) {
+              if (node.tagName === 'SCRIPT') {
+                if (node.type === (shimMode ? 'module-shim' : 'module'))
+                  processScript(node, true);
+                if (node.type === (shimMode ? 'importmap-shim' : 'importmap'))
+                  processImportMap(node, true);
+              }
+              else if (node.tagName === 'LINK' && node.rel === (shimMode ? 'modulepreload-shim' : 'modulepreload')) {
+                processPreload(node);
+              }
+            }
+          }
+        }).observe(document, {childList: true, subtree: true});
+        processScriptsAndPreloads();
+        if (document.readyState === 'complete') {
+          readyStateCompleteCheck();
+        }
+        else {
+          async function readyListener() {
+            await initPromise;
+            processScriptsAndPreloads();
+            if (document.readyState === 'complete') {
+              readyStateCompleteCheck();
+              document.removeEventListener('readystatechange', readyListener);
+            }
+          }
+          document.addEventListener('readystatechange', readyListener);
+        }
+      }
+    }
+    return init;
+  });
+  let importMapPromise = initPromise;
+  let firstPolyfillLoad = true;
+  let acceptingImportMaps = true;
+
+  async function topLevelLoad (url, fetchOpts, source, nativelyLoaded, lastStaticLoadPromise) {
+    if (!shimMode)
+      acceptingImportMaps = false;
+    await initPromise;
+    await importMapPromise;
+    if (importHook) await importHook(url, typeof fetchOpts !== 'string' ? fetchOpts : {}, '');
+    // early analysis opt-out - no need to even fetch if we have feature support
+    if (!shimMode && baselinePassthrough) {
+      // for polyfill case, only dynamic import needs a return value here, and dynamic import will never pass nativelyLoaded
+      if (nativelyLoaded)
+        return null;
+      await lastStaticLoadPromise;
+      return dynamicImport(source ? createBlob(source) : url, { errUrl: url || source });
+    }
+    const load = getOrCreateLoad(url, fetchOpts, null, source);
+    const seen = {};
+    await loadAll(load, seen);
+    lastLoad = undefined;
+    resolveDeps(load, seen);
+    await lastStaticLoadPromise;
+    if (source && !shimMode && !load.n) {
+      if (nativelyLoaded) return;
+      if (revokeBlobURLs) revokeObjectURLs(Object.keys(seen));
+      return await dynamicImport(createBlob(source), { errUrl: source });
+    }
+    if (firstPolyfillLoad && !shimMode && load.n && nativelyLoaded) {
+      onpolyfill();
+      firstPolyfillLoad = false;
+    }
+    const module = await dynamicImport(!shimMode && !load.n && nativelyLoaded ? load.u : load.b, { errUrl: load.u });
+    // if the top-level load is a shell, run its update function
+    if (load.s)
+      (await dynamicImport(load.s)).u$_(module);
+    if (revokeBlobURLs) revokeObjectURLs(Object.keys(seen));
+    // when tla is supported, this should return the tla promise as an actual handle
+    // so readystate can still correspond to the sync subgraph exec completions
+    return module;
+  }
+
+  function revokeObjectURLs(registryKeys) {
+    let batch = 0;
+    const keysLength = registryKeys.length;
+    const schedule = self.requestIdleCallback ? self.requestIdleCallback : self.requestAnimationFrame;
+    schedule(cleanup);
+    function cleanup() {
+      const batchStartIndex = batch * 100;
+      if (batchStartIndex > keysLength) return
+      for (const key of registryKeys.slice(batchStartIndex, batchStartIndex + 100)) {
+        const load = registry[key];
+        if (load) URL.revokeObjectURL(load.b);
+      }
+      batch++;
+      schedule(cleanup);
+    }
+  }
+
+  function urlJsString (url) {
+    return `'${url.replace(/'/g, "\\'")}'`;
+  }
+
+  let lastLoad;
+  function resolveDeps (load, seen) {
+    if (load.b || !seen[load.u])
+      return;
+    seen[load.u] = 0;
+
+    for (const dep of load.d)
+      resolveDeps(dep, seen);
+
+    const [imports, exports] = load.a;
+
+    // "execution"
+    const source = load.S;
+
+    // edge doesnt execute sibling in order, so we fix this up by ensuring all previous executions are explicit dependencies
+    let resolvedSource = edge && lastLoad ? `import '${lastLoad}';` : '';
+
+    // once all deps have loaded we can inline the dependency resolution blobs
+    // and define this blob
+    let lastIndex = 0, depIndex = 0, dynamicImportEndStack = [];
+    function pushStringTo (originalIndex) {
+      while (dynamicImportEndStack[dynamicImportEndStack.length - 1] < originalIndex) {
+        const dynamicImportEnd = dynamicImportEndStack.pop();
+        resolvedSource += `${source.slice(lastIndex, dynamicImportEnd)}, ${urlJsString(load.r)}`;
+        lastIndex = dynamicImportEnd;
+      }
+      resolvedSource += source.slice(lastIndex, originalIndex);
+      lastIndex = originalIndex;
+    }
+
+    for (const { s: start, ss: statementStart, se: statementEnd, d: dynamicImportIndex } of imports) {
+      // dependency source replacements
+      if (dynamicImportIndex === -1) {
+        let depLoad = load.d[depIndex++], blobUrl = depLoad.b, cycleShell = !blobUrl;
+        if (cycleShell) {
+          // circular shell creation
+          if (!(blobUrl = depLoad.s)) {
+            blobUrl = depLoad.s = createBlob(`export function u$_(m){${
+            depLoad.a[1].map(({ s, e }, i) => {
+              const q = depLoad.S[s] === '"' || depLoad.S[s] === "'";
+              return `e$_${i}=m${q ? `[` : '.'}${depLoad.S.slice(s, e)}${q ? `]` : ''}`;
+            }).join(',')
+          }}${
+            depLoad.a[1].length ? `let ${depLoad.a[1].map((_, i) => `e$_${i}`).join(',')};` : ''
+          }export {${
+            depLoad.a[1].map(({ s, e }, i) => `e$_${i} as ${depLoad.S.slice(s, e)}`).join(',')
+          }}\n//# sourceURL=${depLoad.r}?cycle`);
+          }
+        }
+
+        pushStringTo(start - 1);
+        resolvedSource += `/*${source.slice(start - 1, statementEnd)}*/${urlJsString(blobUrl)}`;
+
+        // circular shell execution
+        if (!cycleShell && depLoad.s) {
+          resolvedSource += `;import*as m$_${depIndex} from'${depLoad.b}';import{u$_ as u$_${depIndex}}from'${depLoad.s}';u$_${depIndex}(m$_${depIndex})`;
+          depLoad.s = undefined;
+        }
+        lastIndex = statementEnd;
+      }
+      // import.meta
+      else if (dynamicImportIndex === -2) {
+        load.m = { url: load.r, resolve: metaResolve };
+        metaHook(load.m, load.u);
+        pushStringTo(start);
+        resolvedSource += `importShim._r[${urlJsString(load.u)}].m`;
+        lastIndex = statementEnd;
+      }
+      // dynamic import
+      else {
+        pushStringTo(statementStart + 6);
+        resolvedSource += `Shim(`;
+        dynamicImportEndStack.push(statementEnd - 1);
+        lastIndex = start;
+      }
+    }
+
+    // support progressive cycle binding updates (try statement avoids tdz errors)
+    if (load.s)
+      resolvedSource += `\n;import{u$_}from'${load.s}';try{u$_({${exports.filter(e => e.ln).map(({ s, e, ln }) => `${source.slice(s, e)}:${ln}`).join(',')}})}catch(_){};\n`;
+
+    function pushSourceURL (commentPrefix, commentStart) {
+      const urlStart = commentStart + commentPrefix.length;
+      const commentEnd = source.indexOf('\n', urlStart);
+      const urlEnd = commentEnd !== -1 ? commentEnd : source.length;
+      pushStringTo(urlStart);
+      resolvedSource += new URL(source.slice(urlStart, urlEnd), load.r).href;
+      lastIndex = urlEnd;
+    }
+
+    let sourceURLCommentStart = source.lastIndexOf(sourceURLCommentPrefix);
+    let sourceMapURLCommentStart = source.lastIndexOf(sourceMapURLCommentPrefix);
+
+    // ignore sourceMap comments before already spliced code
+    if (sourceURLCommentStart < lastIndex) sourceURLCommentStart = -1;
+    if (sourceMapURLCommentStart < lastIndex) sourceMapURLCommentStart = -1;
+
+    // sourceURL first / only
+    if (sourceURLCommentStart !== -1 && (sourceMapURLCommentStart === -1 || sourceMapURLCommentStart > sourceURLCommentStart)) {
+      pushSourceURL(sourceURLCommentPrefix, sourceURLCommentStart);
+    }
+    // sourceMappingURL
+    if (sourceMapURLCommentStart !== -1) {
+      pushSourceURL(sourceMapURLCommentPrefix, sourceMapURLCommentStart);
+      // sourceURL last
+      if (sourceURLCommentStart !== -1 && (sourceURLCommentStart > sourceMapURLCommentStart))
+        pushSourceURL(sourceURLCommentPrefix, sourceURLCommentStart);
+    }
+
+    pushStringTo(source.length);
+
+    if (sourceURLCommentStart === -1)
+      resolvedSource += sourceURLCommentPrefix + load.r;
+
+    load.b = lastLoad = createBlob(resolvedSource);
+    load.S = undefined;
+  }
+
+  const sourceURLCommentPrefix = '\n//# sourceURL=';
+  const sourceMapURLCommentPrefix = '\n//# sourceMappingURL=';
+
+  const jsContentType = /^(text|application)\/(x-)?javascript(;|$)/;
+  const wasmContentType = /^(application)\/wasm(;|$)/;
+  const jsonContentType = /^(text|application)\/json(;|$)/;
+  const cssContentType = /^(text|application)\/css(;|$)/;
+
+  const cssUrlRegEx = /url\(\s*(?:(["'])((?:\\.|[^\n\\"'])+)\1|((?:\\.|[^\s,"'()\\])+))\s*\)/g;
+
+  // restrict in-flight fetches to a pool of 100
+  let p = [];
+  let c = 0;
+  function pushFetchPool () {
+    if (++c > 100)
+      return new Promise(r => p.push(r));
+  }
+  function popFetchPool () {
+    c--;
+    if (p.length)
+      p.shift()();
+  }
+
+  async function doFetch (url, fetchOpts, parent) {
+    if (enforceIntegrity && !fetchOpts.integrity)
+      throw Error(`No integrity for ${url}${fromParent(parent)}.`);
+    const poolQueue = pushFetchPool();
+    if (poolQueue) await poolQueue;
+    try {
+      var res = await fetchHook(url, fetchOpts);
+    }
+    catch (e) {
+      e.message = `Unable to fetch ${url}${fromParent(parent)} - see network log for details.\n` + e.message;
+      throw e;
+    }
+    finally {
+      popFetchPool();
+    }
+
+    if (!res.ok) {
+      const error = new TypeError(`${res.status} ${res.statusText} ${res.url}${fromParent(parent)}`);
+      error.response = res;
+      throw error;
+    }
+    return res;
+  }
+
+  async function fetchModule (url, fetchOpts, parent) {
+    const res = await doFetch(url, fetchOpts, parent);
+    const contentType = res.headers.get('content-type');
+    if (jsContentType.test(contentType))
+      return { r: res.url, s: await res.text(), t: 'js' };
+    else if (wasmContentType.test(contentType)) {
+      const module = importShim._w[url] = await WebAssembly.compileStreaming(res);
+      let s = '', i = 0, importObj = '';
+      for (const impt of WebAssembly.Module.imports(module)) {
+        s += `import * as impt${i} from '${impt.module}';\n`;
+        importObj += `'${impt.module}':impt${i++},`;
+      }
+      i = 0;
+      s += `const instance = await WebAssembly.instantiate(importShim._w['${url}'], {${importObj}});\n`;
+      for (const expt of WebAssembly.Module.exports(module)) {
+        s += `const expt${i} = instance['${expt.name}'];\n`;
+        s += `export { expt${i++} as "${expt.name}" };\n`;
+      }
+      return { r: res.url, s, t: 'wasm' };
+    }
+    else if (jsonContentType.test(contentType))
+      return { r: res.url, s: `export default ${await res.text()}`, t: 'json' };
+    else if (cssContentType.test(contentType)) {
+      return { r: res.url, s: `var s=new CSSStyleSheet();s.replaceSync(${
+        JSON.stringify((await res.text()).replace(cssUrlRegEx, (_match, quotes = '', relUrl1, relUrl2) => `url(${quotes}${resolveUrl(relUrl1 || relUrl2, url)}${quotes})`))
+      });export default s;`, t: 'css' };
+    }
+    else
+      throw Error(`Unsupported Content-Type "${contentType}" loading ${url}${fromParent(parent)}. Modules must be served with a valid MIME type like application/javascript.`);
+  }
+
+  function getOrCreateLoad (url, fetchOpts, parent, source) {
+    let load = registry[url];
+    if (load && !source)
+      return load;
+
+    load = {
+      // url
+      u: url,
+      // response url
+      r: source ? url : undefined,
+      // fetchPromise
+      f: undefined,
+      // source
+      S: undefined,
+      // linkPromise
+      L: undefined,
+      // analysis
+      a: undefined,
+      // deps
+      d: undefined,
+      // blobUrl
+      b: undefined,
+      // shellUrl
+      s: undefined,
+      // needsShim
+      n: false,
+      // type
+      t: null,
+      // meta
+      m: null
+    };
+    if (registry[url]) {
+      let i = 0;
+      while (registry[load.u + ++i]);
+      load.u += i;
+    }
+    registry[load.u] = load;
+
+    load.f = (async () => {
+      if (!source) {
+        // preload fetch options override fetch options (race)
+        let t;
+        ({ r: load.r, s: source, t } = await (fetchCache[url] || fetchModule(url, fetchOpts, parent)));
+        if (t && !shimMode) {
+          if (t === 'css' && !cssModulesEnabled || t === 'json' && !jsonModulesEnabled)
+            throw Error(`${t}-modules require <script type="esms-options">{ "polyfillEnable": ["${t}-modules"] }<${''}/script>`);
+          if (t === 'css' && !supportsCssAssertions || t === 'json' && !supportsJsonAssertions)
+            load.n = true;
+        }
+      }
+      try {
+        load.a = parse(source, load.u);
+      }
+      catch (e) {
+        throwError(e);
+        load.a = [[], [], false];
+      }
+      load.S = source;
+      return load;
+    })();
+
+    load.L = load.f.then(async () => {
+      let childFetchOpts = fetchOpts;
+      load.d = (await Promise.all(load.a[0].map(async ({ n, d }) => {
+        if (d >= 0 && !supportsDynamicImport || d === -2 && !supportsImportMeta)
+          load.n = true;
+        if (d !== -1 || !n) return;
+        const { r, b } = await resolve(n, load.r || load.u);
+        if (b && (!supportsImportMaps || importMapSrcOrLazy))
+          load.n = true;
+        if (d !== -1) return;
+        if (skip && skip(r)) return { b: r };
+        if (childFetchOpts.integrity)
+          childFetchOpts = Object.assign({}, childFetchOpts, { integrity: undefined });
+        return getOrCreateLoad(r, childFetchOpts, load.r).f;
+      }))).filter(l => l);
+    });
+
+    return load;
+  }
+
+  function processScriptsAndPreloads (mapsOnly = false) {
+    if (!mapsOnly)
+      for (const link of document.querySelectorAll(shimMode ? 'link[rel=modulepreload-shim]' : 'link[rel=modulepreload]'))
+        processPreload(link);
+    for (const script of document.querySelectorAll(shimMode ? 'script[type=importmap-shim]' : 'script[type=importmap]'))
+      processImportMap(script);
+    if (!mapsOnly)
+      for (const script of document.querySelectorAll(shimMode ? 'script[type=module-shim]' : 'script[type=module]'))
+        processScript(script);
+  }
+
+  function getFetchOpts (script) {
+    const fetchOpts = {};
+    if (script.integrity)
+      fetchOpts.integrity = script.integrity;
+    if (script.referrerPolicy)
+      fetchOpts.referrerPolicy = script.referrerPolicy;
+    if (script.crossOrigin === 'use-credentials')
+      fetchOpts.credentials = 'include';
+    else if (script.crossOrigin === 'anonymous')
+      fetchOpts.credentials = 'omit';
+    else
+      fetchOpts.credentials = 'same-origin';
+    return fetchOpts;
+  }
+
+  let lastStaticLoadPromise = Promise.resolve();
+
+  let domContentLoadedCnt = 1;
+  function domContentLoadedCheck () {
+    if (--domContentLoadedCnt === 0 && !noLoadEventRetriggers && (shimMode || !baselinePassthrough)) {
+      document.dispatchEvent(new Event('DOMContentLoaded'));
+    }
+  }
+  // this should always trigger because we assume es-module-shims is itself a domcontentloaded requirement
+  if (hasDocument) {
+    document.addEventListener('DOMContentLoaded', async () => {
+      await initPromise;
+      domContentLoadedCheck();
+    });
+  }
+
+  let readyStateCompleteCnt = 1;
+  function readyStateCompleteCheck () {
+    if (--readyStateCompleteCnt === 0 && !noLoadEventRetriggers && (shimMode || !baselinePassthrough)) {
+      document.dispatchEvent(new Event('readystatechange'));
+    }
+  }
+
+  const hasNext = script => script.nextSibling || script.parentNode && hasNext(script.parentNode);
+  const epCheck = (script, ready) => script.ep || !ready && (!script.src && !script.innerHTML || !hasNext(script)) || script.getAttribute('noshim') !== null || !(script.ep = true);
+
+  function processImportMap (script, ready = readyStateCompleteCnt > 0) {
+    if (epCheck(script, ready)) return;
+    // we dont currently support multiple, external or dynamic imports maps in polyfill mode to match native
+    if (script.src) {
+      if (!shimMode)
+        return;
+      setImportMapSrcOrLazy();
+    }
+    if (acceptingImportMaps) {
+      importMapPromise = importMapPromise
+        .then(async () => {
+          importMap = resolveAndComposeImportMap(script.src ? await (await doFetch(script.src, getFetchOpts(script))).json() : JSON.parse(script.innerHTML), script.src || baseUrl, importMap);
+        })
+        .catch(e => {
+          console.log(e);
+          if (e instanceof SyntaxError)
+            e = new Error(`Unable to parse import map ${e.message} in: ${script.src || script.innerHTML}`);
+          throwError(e);
+        });
+      if (!shimMode)
+        acceptingImportMaps = false;
+    }
+  }
+
+  function processScript (script, ready = readyStateCompleteCnt > 0) {
+    if (epCheck(script, ready)) return;
+    // does this load block readystate complete
+    const isBlockingReadyScript = script.getAttribute('async') === null && readyStateCompleteCnt > 0;
+    // does this load block DOMContentLoaded
+    const isDomContentLoadedScript = domContentLoadedCnt > 0;
+    if (isBlockingReadyScript) readyStateCompleteCnt++;
+    if (isDomContentLoadedScript) domContentLoadedCnt++;
+    const loadPromise = topLevelLoad(script.src || baseUrl, getFetchOpts(script), !script.src && script.innerHTML, !shimMode, isBlockingReadyScript && lastStaticLoadPromise)
+      .then(() => {
+        // if the type of the script tag "module-shim", browser does not dispatch a "load" event
+        // see https://github.com/guybedford/es-module-shims/issues/346
+        if (shimMode) {
+          script.dispatchEvent(new Event('load'));
+        }
+      })
+      .catch(throwError);
+    if (isBlockingReadyScript)
+      lastStaticLoadPromise = loadPromise.then(readyStateCompleteCheck);
+    if (isDomContentLoadedScript)
+      loadPromise.then(domContentLoadedCheck);
+  }
+
+  const fetchCache = {};
+  function processPreload (link) {
+    if (link.ep) return;
+    link.ep = true;
+    if (fetchCache[link.href])
+      return;
+    fetchCache[link.href] = fetchModule(link.href, getFetchOpts(link));
+  }
+
+})();
diff --git a/wp-includes/js/dist/vendor/wp-polyfill-importmap.min.js b/wp-includes/js/dist/vendor/wp-polyfill-importmap.min.js
new file mode 100644
index 0000000000..64779c5616
--- /dev/null
+++ b/wp-includes/js/dist/vendor/wp-polyfill-importmap.min.js
@@ -0,0 +1 @@
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diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 50864cfd7b..25977a9bd7 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -96,6 +96,7 @@ function wp_default_packages_vendor( $scripts ) {
 		'lodash',
 		'wp-polyfill-fetch',
 		'wp-polyfill-formdata',
+		'wp-polyfill-importmap',
 		'wp-polyfill-node-contains',
 		'wp-polyfill-url',
 		'wp-polyfill-dom-rect',
@@ -120,6 +121,7 @@ function wp_default_packages_vendor( $scripts ) {
 		'wp-polyfill-object-fit'      => '2.3.5',
 		'wp-polyfill-inert'           => '3.1.2',
 		'wp-polyfill'                 => '3.15.0',
+		'wp-polyfill-importmap'       => '1.8.2',
 	);
 
 	foreach ( $vendor_scripts as $handle => $dependencies ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 125e43b77a..66ea978826 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-alpha-57491';
+$wp_version = '6.5-alpha-57492';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.